"We've installed to standard installation practice!" Photovoltaic installations need different ratings. To know more details click here: http://www.hensel.in Passion for Power!!!

1. 98
17
0654
02.10/101/12
Installation according to standard installation
practice won’t work!
THE ELEKTRO
Customer information for electro-technical specialists 2/2010
nificantly from normal power distribu-
tion in buildings in that the installed
devices are subject to a continous
load.
Why are special solutions needed for
PV plants?
The rating respectively dimensioning
of photovoltaic installations differs sig-
Collection
of
new
ideas
in
the
Electrotechnical
Industry
Why did the miniature
circuit breakers trip again
already?
The customer wants to set
the plant in operation as
soon as possible!
I'm confused.
But we installed according
to standard installation
practice!
“We’ve installed to
standard installation
practice!”
Photovoltaic installations need
different rating.
Dear Reader,
Up to the present time Germany has
been the largest market for photovolta-
ic systems in the world. This situation
will change - in the meantime many
other countries are catching up.
Amongst others the Indian government
has enacted a programme that will
extend the solar energy capacity of the
country to 20,000 megawatts by 2022.
Many electro-technical requirements
are linked with the installation of pho-
tovoltaic systems - and many mistakes
can be made leading to considerable
damage.
Hensel has many years of experience in
the field of the installation of photo-
voltaic systems - not only on the direct
current (DC) but also on the alternating
current (AC) sides.
Make use of our experience in this field;
we wish you a successful start in a very
promising growth market of the future.
Yours sincerely
F.G. Hensel.
Managing Director
Gustav Hensel GmbH & Co. KG
P.S.
In Germany, Elektro-Tipp has been
published for more than 25 years – it
appears quarterly and has a fine repu-
tation among the experts.

2. Photovoltaic installations require a new way of thinking
about rating and device selection!
What is different about photovoltaic installations?
Power distribution
in buildings
Power distribution in
photovoltaic plants
Applying the si-
multaneity factor
Due to the low simultaneity factor, the
installed distribution board is often rated
according to the number of modules.
PV plants have a simultaneity factor
of 1!
Which is why the distribution boards in
PV plants have to be rated differently and
not simply according to the number of
modules.
Influenced by
heat from the
simultaneity
factor and load
In electrical installations, power loss
fluctuates depending on the number of
switched on consumers.
Low average effective power loss
Constant high loads lead to high average
power dissipation during the energy
production phase.
Power dissipation therefore needs to be
reduced to the point where the maximum
temperature for devices is not exceeded.
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Power loss Pv
Ø effective
power loss
time
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Power loss Pv
Ø effective
power loss
time
Summary:
High power loss levels can lead to exceeding the maximum permit-
ted temperature for devices meaning that protection devices can
trip even when beneath rated current levels.
Protective device
selection
Protective device selection and rating to
protect cables related to the current resp.
the load of the consumer.
Protective device selection and rating to
protect cables related to the current resp.
load of the solar inverter on the AC side.
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Select protective devices, e.g. miniature
circuit breakers (MCB)
Select protective devices in the form of a
fuse or miniature circuit breaker.
HRC with
knife link
Surge
arrester
Miniature
circuit breaker
solar inverter
to metering

3. 
Unskilled persons can use miniature circuit breakers without
any danger as the protection against direct contact always
remains in place and the device can thus be switched under
load.

A tripped miniature circuit breaker (MCB) can be recognised
immediately!
1. Miniature circuit breaker use
Hensel PV inverter collectors correctly rated
and tested: e.g. circuit-breaker box
4.
N and PE terminals in separate boxes
High simultaneity and load:

Devices spaced apart allow a better radiation of the power
dissipation.

Additional slots assure increased air circulation in the enclo-
sure.

The larger enclosure increase the dissipated power loss.
2.
Assessing simultaneity and load capacity
3. Standard installation benefits

Equipment set apart allows for better power loss dissipation.
Positioning aids make sure that the installed equipment is
automatically set at an appropriate interval.

At the same time the miniature circuit breaker is installed in
the right position relative to the protection cover.
Your benefit:
 Tested product solutions!

Standardised installation benefits,
products provide for tested positioning
of miniature circuit breakers (MCB)

PV solar inverter collectors are compatible
with the Hensel Mi system
up
to
AC
500
V
up
toDC
1000
V
Inverter
SPD = Surge protection
device
PV modules
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Power distribution

4. Hensel PV inverter collectors
perfectly rated and tested!
 Complete enclosure sets, not assembled
 With external brackets for box fixing
 Cable entry to be ordered separately
 Protection class: II
 Degree of protection: IP 65
Rated capacity 70 kW
Incoming:
Outgoing:
max. 18 x 1~ solar inverters
switch disconnector, 3-pole
Mi PV 6111 Connection of 1~ solar inverters
Mi PV 6311 Connection of 3~ solar inverters
with surge protection
Mi PV 6211 Connection of 1~ solar inverters
Mi PV 6411 Connection of 3~ solar inverters
Rated capacity 140 kW
Incoming:
Outgoing:
max. 36 x 1~ solar inverters
switch disconnector, 3-pole
Mi PV 6123 Connection of 1~ solar inverters
Mi PV 6323 Connection of 3~ solar inverters
with surge protection
Mi PV 6223 Connection of 1~ solar inverters
Mi PV 6423 Connection of 3~ solar inverters
Rated capacity 140 kW
Incoming:
Outgoing:
Bus-mounted switch disconnector with fuse
6 x 63 A, 3-pole D02, E 18
switch disconnector 1 x HRC 1, 3-pole
Mi PV 5123 Connection of 1~ solar inverters
Mi PV 5323 Connection of 3~ solar inverters
with surge protection
Mi PV 5223 Connection of 1~ solar inverters
Mi PV 5423 Connection of 3~ solar inverters
Distribution boards
Combinable enclosure system
with door up to 250 A, IP 65
DK Cable junction boxes
1.5 to 240 mm
2
, IP 54-67
KV Small-type distribution
boards
3 to 54 modules, IP 54- 65
Mi Distribution boards
up to 630 A, IP 54-65
Cable entry systems
Photovoltaik distributors
that meet the standards
Construction board panels
up to 630 A, IP 44-65
R. Rajesh
Managing Director
Hensel Electric India
Pvt Ltd
info@hensel-electric.in
www.hensel.in
Delivery in India via Hensel authorized
distributor network spanning 130 cities and
industrial centers.
Delivery in South East Asia via Hensel
authorized distributor network in all ASEAN
countries.
10
11
Safe product solutions
conforming to standards for
PHOTOVOLTAIC
PLANTS
Industrial Electrical Power Distribution Systems
NEW
with extended product range
Professional Photovoltaic Distributors
New Product
information
with the proven
and tested photo-
voltaic solutions
from Hensel!
NEW
Please ask for the new product information
Safe product solutions conforming to standards
for photovoltaic plants at www.hensel.in!
Hensel
Electric
India
Pvt
Ltd
35,
Kunnam
Village,
Sunguvarchathram
-
Walajabad
Road
Tel
:
+
91
44
6712
7700
Industrial
Electrical
Power
Distribution
Systems
Sriperumbudur-
631
604
Fax
:
+
91
44
6712
7724
Editorial
Office
Elekt
Kanchipuram
Dist,
Tamil
Nadu
Email:
info@hensel-electric.in
.
www.hensel.in